Method and device for garbage collection based on virtual machine

Abstract

The embodiment of the invention provides a garbage recycling method and device based on a virtual machine. The method comprises the following steps that after it is determined that a first storage space is filled with novel objects created by an application program, all active objects in the first storage space and a second storage space at the current moment are stored into a third storage space; after it is determined that all the active objects are stored into the third storage space, clearing up the first storage space and the second storage space; according to the size, accounting for the storage space, of all the active objects, the size of the second storage space and the size of the third storage space are reset, and the second storage space and the third storage space are subjected to switch processing. According to the method, the pile space utilization rate can be increased, and the performance of the application program is improved.

Description

technical field [0001] Embodiments of the present invention relate to storage technologies, and in particular to a virtual machine-based garbage collection method and device. Background technique [0002] The memory management of Java programs is done by the Java virtual machine. During the execution of the application, if the application thread of the application cannot continue to allocate new objects in the Java heap, the Java virtual machine will trigger garbage collection to reclaim unused memory, so that the subsequent memory allocation process of new objects can proceed smoothly . [0003] The copy garbage collection algorithm is one of the garbage collection algorithms. Its implementation process is mainly as follows: the heap storage space is divided into two parts equally, the first part of the storage space is used for the current application thread to allocate new objects, and the second part of the storage space is reserved Storage space for saving active obje...

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Problems solved by technology

[0004] However, because most of the newly created objects will soon become inactive objects during the running of Java applications, so when garbage collection occurs, the number of active objects only accounts for a small part of the entire new objects. The storage space is the same size as the storage space for allocating new objects, so the heap storage space cannot be fully utilized, the storage space for allocating new objects is limited, the frequency of garbage collection increases, and the performance of the application is low

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